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Patent Searching and Data


Title:
GHOST ELIMINATING DEVICE
Document Type and Number:
Japanese Patent JPS58124378
Kind Code:
A
Abstract:

PURPOSE: To prevent an unsightly picture screen from appearance of a signal under equalization in a ghost eliminating circuit on the screen, by using an output after or before ghost elimination through changeover depending on a signal whether or not being under equalization.

CONSTITUTION: A video signal A including ghost being an output of an intermediate frequency video detection circuit 12 and a video signal B eliminating ghost are switched at a switch circuit 13 with a signal E whether or not being under equalization outputted from a ghost eliminating circuit 11, and applied to a video signal processing amplifier circuit 14 and a chroma signal processing amplifier circuit 15. That is, the signal A is outputted during ghost equalization period and the signal B is outputted after equalization. The signal E representing the state of equalization is processed at an operation circuit (not shown) and this signal changes over the signals A and B. Thus, the signal under equalization in the circuit 11 does not appear at the screen, allowing to prevent an unsightly screen.


Inventors:
SHIOTANI YUUICHI
SHINPO HIROYASU
YASUMOTO YOSHIO
Application Number:
JP811082A
Publication Date:
July 23, 1983
Filing Date:
January 20, 1982
Export Citation:
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Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
H04N5/21; (IPC1-7): H04N5/48
Attorney, Agent or Firm:
Akira Kobiji (2 outside)



 
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